JP2003007989A - Image recording medium and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the picture quality of an image without recording a false image and without generating a discharge breakdown in an image recording medium in which a height exists on an electrode layer. SOLUTION: An electrode layer part 11a in which the height of a first electrode layer 11 exists on a radiation-image recording medium 10 is installed at an insulating film 30, it is electrically isolated from another electrode layer part 11b, and a DC voltage applied to the electrode layer 11 in a recording operation is not applied to the electrode layer part 11a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording medium having a power storage unit for accumulating as a latent image charge an amount of charge corresponding to an irradiated recording electromagnetic wave, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as an image recording medium having a power storage unit for accumulating an amount of electric charge corresponding to an irradiated recording electromagnetic wave as a latent image charge, for example, in radiography for medical use, an X-ray or the like has A radiation image recording medium (electrostatic recording medium) having a photoconductor such as a selenium plate which is sensitive to radiation was used as a photoconductor, and the radiation image recording medium was irradiated with X-rays, and the radiation dose was changed according to the dose of the irradiated radiation. The radiation image information is recorded as an electrostatic latent image by accumulating a certain amount of electric charge in a power storage unit in the radiation image recording medium, and the radiation image recording medium on which the radiation image information is recorded is scanned by a laser beam or line light. By doing so, a method of reading radiation image information from the radiation image recording medium is known (for example, US Pat. No. 4,535,468). By using the radiation image recording medium, it is possible to reduce the exposure dose to the subject and improve the diagnostic performance.

The applicant of the present application has disclosed in Japanese Patent Application Laid-Open No. 2000-105297 and Japanese Patent Application No. 10-271374 a radiation image recording medium which enables both high-speed read response and efficient signal charge extraction. And a recording device for recording radiation image information on the radiation image recording medium, and a reading method and device for reading the radiation image information from the radiation image recording medium on which the radiation image information is recorded as an electrostatic latent image. .

The method described in Japanese Patent Application Laid-Open No. 2000-105297 is such that the first electrode layer that transmits the recording radiation or the light emitted by the excitation of this radiation is irradiated with the radiation or the above-mentioned light. A recording photoconductive layer having conductivity, a charge transport layer that acts as a substantially insulator for latent image charges, and a substantially conductor for transport charges having a polarity opposite to that of the latent image charges, and reading A radiation image recording medium comprising a reading photoconductive layer which exhibits conductivity by being irradiated with an electromagnetic wave for reading and a second electrode layer which transmits the reading electromagnetic wave in this order are used. The first electrode layer of the recording layer is irradiated with recording radiation, and an amount of electric charge according to the dose of the irradiated radiation is accumulated in a power storage unit formed substantially at the interface between the recording photoconductive layer and the charge transport layer. Therefore, the radiation image information The information is recorded as an electrostatic latent image, and the recorded electrostatic latent image is read out by irradiation with electromagnetic waves for reading to obtain radiation image information.

Furthermore, the present applicant has also proposed a radiation image recording medium in which the second electrode layer is a stripe electrode in which a large number of linear electrodes that transmit electromagnetic waves for reading are arranged in a stripe pattern, In this radiation image recording medium, since the latent image charges can be concentrated and accumulated in the electricity storage portion corresponding to each linear electrode of the stripe electrode, the sharpness of the image can be improved.

In the above-mentioned radiation image recording medium, a DC voltage is applied so that the first electrode layer has a negative potential and the second electrode layer has a positive potential, and the radiation transmitted through the subject is When the first electrode layer of the radiation image recording medium is irradiated with the radiation, a charge pair corresponding to the dose of the radiation is generated in the recording photoconductive layer due to the irradiation of the radiation transmitted through the first electrode layer, and a negative The charges are accumulated as latent image charges in the power storage unit, and the radiation image is recorded as an electrostatic latent image.

Then, the application of the DC voltage is stopped, the first electrode layer and the second electrode layer are short-circuited to rearrange the charges, and then the second electrode layer of the radiation image recording medium. When the reading electromagnetic wave is irradiated onto the reading photoconductive layer, the electromagnetic wave passes through the second electrode layer and is irradiated to the reading photoconductive layer, and a charge pair is generated in the reading photoconductive layer. Is combined with the negative charge accumulated in the power storage unit through the charge transport layer, and the negative charge is recombined with the positive charge charged in the second electrode layer, so that discharge is generated. An electrostatic latent image is read by detecting a voltage change generated between the first electrode layer and the second electrode layer by this discharge as a current change by a current detection amplifier or the like.

Here, in the radiation image recording medium used in the radiation image recording / reading apparatus as described above, the recording photoconductive layer or the reading photoconductive layer is made of a-Se (amorphous selenium) or the like. It is formed by a resistance heating vapor deposition method.

[0009]

However, when the recording photoconductive layer or the reading photoconductive layer is formed by the resistance heating vapor deposition method as described above, the recording photoconductive layer or the reading photoconductive layer is formed by bumping. The layer contains a mass of a-Se of about 1 mm, and the mass causes the convex portion of a predetermined range to exist on the surface of the recording photoconductive layer or the reading photoconductive layer. Then, the first electrode layer or the second electrode layer is formed on the surface of the recording photoconductive layer or the reading photoconductive layer having the protrusions by a vacuum deposition method or the like, as shown in FIG. Thus, there will be convex portions on the surface of the electrode layer. When such a convex portion is present on the surface of the electrode layer, the first electrode layer 41 and the second electrode layer 4 are formed during the recording.
When a high-voltage DC voltage (5 to 10 V / μm) is applied between No. 5 and 5, the normal electric field distribution is not formed around the convex portion, and thus a false image may be recorded. further,
There is a possibility that electric discharge destruction of the electrode layer may occur not only by recording such a false image. When the above phenomenon occurs, a false image 80a due to an abnormal electric field distribution, a false image 80b due to discharge breakdown of the linear electrode, and the like appear in the read radiation image 80, as shown in FIG. It becomes difficult to perform accurate image diagnosis. The generation of the false image is unlikely to occur when the DC voltage is a relatively low voltage of 3 to 5 V / μm, but when such a DC voltage is applied, an electric field formed over the entire radiation image recording medium. Since the intensity becomes weaker, the image quality deteriorates over the entire read radiation image.

In view of the above problems, the present invention has a convex portion in the electrode layer due to a mass of a-Se generated in the recording photoconductive layer or the reading photoconductive layer due to the bumping or the like. It is an object of the present invention to provide an image recording medium and an image recording medium capable of improving the image quality of an image to be read without causing the false image and the discharge breakdown as described above. .

[0011]

An image recording medium according to the present invention comprises a first electrode layer which transmits electromagnetic waves for recording, a photoconductive layer for recording which exhibits conductivity by receiving electromagnetic waves for recording, and A power storage unit that stores latent image charges generated in the photoconductive layer, a reading photoconductive layer that exhibits conductivity by being irradiated with an electromagnetic wave for reading, and a second electrode layer that transmits the electromagnetic wave for reading are in this order. In an image recording medium having the present invention, at least one of the first electrode layer and the second electrode layer has a projection in a predetermined range, and in the electrode layer having the projection, an electrode layer portion including the projection Is electrically separated from other electrode layer portions.

The above-mentioned "convex portion in a predetermined range" is, for example,
As shown in FIG. 7, it means a portion where the diameter d of the cross section at a height 1/10 of the height h from the surface of the electrode layer is 0.5 mm or more.

The "electrode layer portion including the convex portion" means, for example, an electrode layer portion in the circular range of the diameter d + 1 mm to d + 4 mm.

Further, the phrase "the electrode layer portion including the convex portion is electrically separated from the other electrode layer portions" means that the first electrode layer and the second electrode layer are separated during the recording. It means that when a DC voltage is applied between them, the electrode layer portion including the convex portion is insulated from other electrode portions to the extent that the DC voltage is not applied.

Further, it is possible to have an insulating film for electrically separating the electrode layer portion including the convex portion and the other electrode layer portion.

The "insulating film" is preferably a circular film having a diameter of d + 1 mm to d + 4 mm.

Further, the present invention can be applied when the convex portion is caused by bumping generated in at least one of the recording photoconductive layer and the reading photoconductive layer.

The method for producing an image recording medium according to the present invention includes a first electrode layer which transmits an electromagnetic wave for recording, a recording photoconductive layer which exhibits conductivity by receiving an electromagnetic wave for recording, and a photoconductive layer for recording. A power storage unit for accumulating the generated latent image charge, a reading photoconductive layer which exhibits conductivity by being irradiated with an electromagnetic wave for reading, and a second electromagnetic wave for transmitting the electromagnetic wave for reading.
In this order, and has a predetermined range of projections on at least one of the surface of the recording photoconductive layer in contact with the first electrode layer and the surface of the reading photoconductive layer in contact with the second electrode layer. In the method of manufacturing an image recording medium having a convex portion, an insulating film is formed on a part of the surface including the convex portion of the surface of the photoconductive layer having a convex portion, and the surface of the photoconductive layer on which the insulating film is formed. The electrode layer portion formed on the surface of a part including the convex portion is electrically separated from the other electrode layer portion by forming the electrode layer by vacuum evaporation.

Here, the "partial surface including the convex portion" is preferably a surface in the circular range of the diameter d + 1 mm to d + 4 mm. Further, the detection of the convex portion may be performed visually or automatically by a sensor or the like.

Further, "to form an insulating film" means, for example, that a mask seal made of an insulating material may be attached to a part of the surface including a convex portion, or it may be formed by applying an insulating film material. You may do it.

The image recording medium may be provided with layers other than the above layers.

[0022]

According to the image recording medium of the present invention, when a convex portion in a predetermined range exists on at least one of the first electrode layer and the second electrode layer of the image recording medium, the convex portion is formed. In the existing electrode layer, since the electrode layer portion including the convex portion is electrically separated from the other electrode layer portion, it is possible to avoid the formation of an abnormal electric field distribution due to the electrode layer including the convex portion. Therefore, it is possible to prevent the recording of the false image and the discharge breakdown, and to improve the image quality as the diagnostic image.

When an insulating film is provided to electrically separate the electrode layer portion including the convex portion and the other electrode layer portion, a simple structure can be realized.

According to the method of manufacturing an image recording medium of the present invention, an insulating film is formed on a part of the surface of the photoconductive layer having a convex portion, including the convex portion, and the photoconductive layer having the insulating film is formed. By forming the electrode layer on the surface of the layer by vacuum vapor deposition, the electrode layer portion formed on a part of the surface including the convex portion is electrically separated from other electrode layer portions, so that It is possible to achieve electrical isolation.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a specific embodiment of a radiation image recording / reading apparatus using a radiation image recording medium manufactured by the image recording medium manufacturing method of the present invention, and FIG. 2 is shown in FIG. It is a bottom view of a radiation image recording medium.

The radiation image recording medium 10 includes a first electrode layer 11 which transmits recording radiation (for example, X-rays, etc., hereinafter referred to as recording light) L1, and recording light L1 which transmits the first electrode layer 11. Of the recording photoconductive layer 12 which becomes conductive by being irradiated with the latent image charge (eg, negative charge), acts as an insulator substantially, and has a transport charge having the opposite polarity to the latent image charge (described above). In the above example, the charge transport layer 13 that acts as a substantially electric conductor with respect to positive charges), the reading photoconductive layer 14 that exhibits conductivity by being irradiated with the reading electromagnetic wave (hereinafter referred to as reading light) L2, The second electrode layer 15 that transmits the reading light L2 is laminated in this order. In addition,
The radiation image recording medium 10 is formed in order from the second electrode layer 15 on a support that transmits the reading light L2.
The support is not shown in FIG.

The radiation image recording medium 10 used in the present embodiment has a recording photoconductive layer 1 as shown in FIG.
In FIG. 2, a convex portion is present in the first electrode layer 11 due to a mass 50 of a-Se generated by bumping in the manufacturing process (resistance heating vapor deposition). Therefore, the radiation image recording medium 10 used in this embodiment has the first electrode layer portion 11a having the convex portion and the other first electrode layer portion 11b by being manufactured as follows. They are electrically separated.

The radiation image recording medium 10 used in this embodiment has a second electrode layer 15, a reading photoconductive layer 14, and a charge transport layer 1 on a support 20 as shown in FIG. 3 (A).
3 and the recording photoconductive layer 14 are laminated in this order, and then the mask seal 30 is attached to a predetermined range including the convex portion existing on the surface of the recording photoconductive layer 12. The convex portion may be visually detected, or may be automatically detected by another sensor or the like. Further, as a condition for being recognized as a convex portion, for example, it is desirable that the diameter d of the cross section of the convex portion at a height 1/10 of the height h of the convex portion is 0.5 mm or more. The material of the mask seal 30 may be any material as long as it is an insulating film that electrically separates the electrode layer portion 11a and the electrode layer portion 11b. Further, it is desirable that the mask seal 30 has a circular shape having a diameter of d + 1 mm to d + 4 mm.

Next, as shown in FIG. 3B, the first electrode layer 11 is formed on the surface of the recording photoconductive layer 11 to which the mask seal 30 is attached by the vacuum evaporation method. By forming the first electrode layer 11 as described above, the first electrode layer portion 11a and the electrode layer portion 12a are electrically separated via the mask seal 30.

The material of the recording photoconductive layer 12 is amorphous selenium (a-Se), PbO, PbI.
Lead (II) oxide such as ₂ and lead (II) iodide, Bi ₁₂ (G
e, Si) O ₂₀ , Bi ₂ I ₃ / organic polymer nanocomposite and the like, a photoconductive substance containing at least one of the main components is suitable.

The material of the charge transport layer 13 is, for example,
Mobility of the negative charge charged on the first electrode layer 11 and vice versa
The larger the difference in mobility of positive charges having polarities, the better (eg,
10 ^TwoAbove, preferably 10^ThreeOr more) Poly N-vinyl
Lucarbazole (PVK), N, N'-diphenyl-N, N'-
Bis (3-methylphenyl)-[1,1'-biphenyl]-
Such as 4,4'-diamine (TPD) and discotic liquid crystal
Organic compounds or polymers of TPD (polycarbonate
, Polystyrene, PUK) dispersion, Cl 10-2
A semiconductor material such as a-Se doped with 00 ppm is suitable.
is there. In particular, organic compounds (PVK, TPD, disco
(E.g., tick liquid crystal) is preferable because it has light insensitivity.
In addition, since the dielectric constant is generally small, the charge transport layer 13 and the reading
Since the capacity of the photoconductive layer 14 becomes small, the signal extraction efficiency at the time of reading
Can be increased. In addition, "it has a light insensitivity
Means that even if the recording light L1 or the reading light L2 is irradiated,
It means that it is not electrically conductive.

The material of the reading photoconductive layer 14 is a-
Se, Se-Te, Se-As-Te, metal-free phthalocyanine, metal phthalocyanine, MgPc (Magnesium ph)
talocyanine), VoPc (phaseII of Vanadyl phthal
Cyanine), CuPc (Cupper phtalocyanine), or the like, and a photoconductive substance containing at least one of them as a main component is suitable.

The thickness of the recording photoconductive layer 12 is 50 μm or more and 100 mm or more in order to sufficiently absorb the recording light L1.
It is preferably 0 μm or less, and in this example, about 500 μm.
μm. The total thickness of the charge transport layer 13 and the reading photoconductive layer 14 is 1 / thickness of the recording photoconductive layer 12.
It is preferably 2 or less, and the thinner it is, the better the response at the time of reading. Therefore, it is preferably 1/10 or less, more preferably 1/20 or less.

First electrode layer 11 and second electrode layer 15
For example, a nesa film in which a conductive material is applied on a transparent glass plate is suitable.

The electrode of the second electrode layer 15 is formed as a stripe electrode 16 in which a large number of elements (linear electrodes) 16a are arranged in a stripe shape as shown in FIG. The space 15a between the elements 16a is filled with a polymer material such as polyethylene in which a small amount of a pigment such as carbon black is dispersed, and has a property of blocking the reading light L2.

As the support, an organic polymer material can be used. For example, polymethylmethacrylate (P
MMA) or the like can be used.

Next, the radiation image recording / reading apparatus of this embodiment will be described with reference to FIG. The radiation image recording / reading device includes a radiation image recording medium 10, a current detection circuit 70, a recording light irradiation unit 90, and a reading light irradiation unit 93.

A subject 9 is disposed on the upper surface side of the first electrode layer 11, and the subject 9 has a transmitting portion 9a that transmits the recording light LI and a blocking portion (light shielding portion) 9b that does not transmit the recording light LI.
The recording light irradiation means 90 uniformly irradiates the recording light L1 onto the subject 9.

The reading light irradiating means 93 applies the reading light L2, which is substantially uniform in a line, to each element 16a of the stripe electrode 16.
The scanning exposure is performed in the longitudinal direction of the element 16a (sub-scanning direction in FIG. 2) while being substantially orthogonal to. The scanning exposure by the reading light L2 corresponds to the sub scanning.
In this scanning exposure, continuous light may be irradiated,
You may make it irradiate a pulsed light.

The current detection circuit 70 is for obtaining an image signal of a level corresponding to the amount of latent image charge accumulated in the electricity storage section 19, and a current detection amplifier 71 connected to each element 16a of the stripe electrode 16. Have many. The current detection amplifier 71 includes an operational amplifier 71a, an integrating capacitor 71b and a switch 71c. The first electrode layer 11 of the radiation image recording medium 10 is connected to one of the switches 73 and the negative electrode of the power supply 72. The positive electrode of the power supply 72 is connected to the other of the switches 73. Each operational amplifier 7
The non-inverting input terminal (+) of 1a is commonly connected to one end of the switch 73, and the inverting input terminal (−) is the element 16a.
Are individually connected to.

The switch 73 is connected to the power source 72 at the time of recording and is connected through an imaginary short circuit of the operational amplifier.
A predetermined DC voltage from the power supply 72 is applied between the first electrode layer 11 and the stripe electrode 16.

On the other hand, at the time of reading, the switch 73 is connected to the first electrode layer 11 and the first electrode layer and the striped electrode 16 are short-circuited via the immergenary short circuit of the operational amplifier, so that the line-shaped reading is performed. When the light L2 is exposed to the stripe electrode 16, each current detection amplifier 71
Simultaneously detects the current flowing through each element 16a for each connected element 16a. The configurations of the current detection circuit 70 and the current detection amplifier 71 are not limited to this example, and various types can be used.

Hereinafter, a method of recording image information as an electrostatic latent image on the radiation image recording medium 10 and reading the recorded electrostatic latent image in the radiation image recording / reading device having the above-described configuration will be described. First, the electrostatic latent image recording process will be described with reference to the charge model shown in FIG. The negative charges and positive charges generated in the recording photoconductive layer 12 by the recording light L1 are represented by circles-or + in the drawing. In addition, the radiation image recording medium 10
The support of is omitted in the figure.

When recording an electrostatic latent image on the radiation image recording medium 10 in the radiation image recording / reading apparatus having the above-described structure, first, the switch 73 is switched to the power source 72, and the first electrode layer 11 and the stripe electrode 16 are connected. A DC voltage is applied between the two to charge them. Thereby, the first electrode layer 11
A substantially U-shaped electric field is formed between the photoconductive layer 12 and the stripe electrode 16, and a substantially parallel electric field exists in most of the recording photoconductive layer 12, but the photoconductive layer 12 and the charge transport layer 13 are present. There is a portion where there is no electric field at the interface with and, that is, in the electricity storage unit 19. Then, this U-shaped electric field is applied to the element 16
A continuous electric field distribution is formed in the lengthwise direction of a (FIG. 4).
(A)).

Here, in the radiation image recording medium 10 used in this embodiment, the first electrode caused by the agglomerates 50 of a-Se generated by bumping in the recording photoconductive layer 12 as described above. In the convex portion of the layer 11, the electrode layer portion 1
Since 1a and the electrode layer portion 11b are electrically separated via the mask seal 30, no DC voltage is applied to the electrode layer portion 11a.

Next, the subject 9 is bombarded with radiation, and the subject 9 is exposed.
The radiation image recording medium 10 is irradiated with the recording light L1 that carries the radiation image information of the subject 9 that has passed through the transparent portion 9a.
Then, the recording photoconductive layer 12 of the radiation image recording medium 10 is recorded.
Positive and negative charge pairs are generated inside, and the negative charges in the pair move to the power storage unit 19 along the electric field distribution described above (FIG. 4B).
On the other hand, the positive charges generated in the recording photoconductive layer 12 move toward the first electrode layer 11 at high speed,
At the interface between the recording photoconductive layer 12 and the recording photoconductive layer 12, the negative charges injected from the power source 72 are recombined and disappear. Further, since the recording light L1 does not pass through the light shielding portion 9b of the subject 9, the portion below the light shielding portion 9b of the radiation image recording medium 10 does not change at all (FIGS. 4B and 4C).

Here, since no DC voltage is applied to the electrode layer portion 11a as described above, formation of an abnormal electric field distribution due to the convex portion of the first electrode layer 11 can be avoided,
It is possible to avoid recording a false image caused by this. The recording photoconductive layer 12 corresponding to the electrode layer portion 11a includes the electrode layer portion 1 around the electrode layer portion 11a.
Due to the wraparound of the lines of electric force generated by 1b, a state similar to the state where a low voltage (3 to 5 V / μm) is applied is obtained, and a normal image which is not a false image is recorded although the image quality is deteriorated. Will be. Further, in order to avoid the deterioration of the image quality, the correction may be performed by using a gain table obtained in advance.

In this way, by irradiating the subject 9 with the recording light L1, charges corresponding to the subject image are accumulated in the electricity storage section 19 which is an interface between the recording photoconductive layer 12 and the charge transfer layer 13. Will be able to. The amount of the accumulated latent image charge (negative charge) is substantially proportional to the dose of the radiation that has passed through the subject 9 and is incident on the radiation image recording medium 10. Therefore, this latent image charge carries an electrostatic latent image. The electrostatic latent image is recorded on the radiation image recording medium 10.

Next, an electrostatic latent image reading process in the radiation image recording / reading apparatus of the present embodiment will be described.

When reading an electrostatic latent image from the radiation image recording medium 10, first, the switch 73 is connected to the first electrode layer 11, and the first electrode layer 11 and the stripe electrode 16 are imaginarily shorted to the operational amplifier 71a. Shorted through
Perform charge rearrangement. Next, in the longitudinal direction of the element 16a (sub-scanning direction in FIG. 2), the reading light irradiation means 93 is provided.
By sub-scanning, the radiation image recording medium 10 is scanned and exposed by the line-shaped reading light L2. By this scanning exposure of the reading light L2, positive and negative charge pairs are generated in the photoconductive layer 14 to which the reading light L2 corresponding to the sub-scanning position is incident.

A very strong electric field (strong electric field) is formed between the electricity storage unit 19 and the stripe electrode 16, and the charge transport layer 13 acts as a conductor for positive charges. Therefore, the positive charge generated in the reading photoconductive layer 14 rapidly moves in the charge transport layer 13 so as to be attracted to the latent image charge in the storage portion 19, and the latent image charge and charge recombination is performed in the power storage portion 19. Then disappears. On the other hand, the photoconductive layer 1 for reading
The negative charges generated in No. 4 recombine with the positive charges of the first electrode layer 11 and the stripe electrode 16 and disappear. The voltage change between the first electrode layer 11 and the stripe electrode 16 due to the charge recombination is detected as a current change by the current detection amplifier 71. The current flowing through the radiation image recording medium 10 during this reading corresponds to the latent image charge, that is, the electrostatic latent image. Therefore, by detecting this current by the current detection amplifier 71, the electrostatic latent image is formed. It is possible to read, that is, obtain an image signal representing the electrostatic latent image.

According to the radiation image recording medium 10 to which the image recording medium according to the present invention is applied, at least one of the first electrode layer 11 and the second electrode layer 15 of the radiation image recording medium 10 has a predetermined range. In an electrode layer having a convex portion and having a convex portion, the electrode layer portion including the convex portion is electrically separated from the other electrode layer portion. It is possible to avoid the formation of a large electric field distribution, prevent the recording of false images and the discharge breakdown, and improve the image quality as a diagnostic image.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a radiation image recording / reading apparatus using a radiation image recording medium to which an image recording medium according to the present invention is applied.

FIG. 2 is a bottom view of the radiation image recording medium shown in FIG.

FIG. 3 is a diagram illustrating a method of manufacturing a radiation image recording medium to which the method of manufacturing an image recording medium according to the present invention is applied.

4A and 4B are views for explaining a radiation image recording process in the radiation image recording / reading apparatus shown in FIG.

FIG. 5 is a diagram illustrating a convex portion of a first electrode layer due to bumping of a radiation image recording medium according to a conventional technique.

FIG. 6 is a diagram showing a radiation image when the radiation image recording medium shown in FIG. 5 is read.

FIG. 7 is a detailed explanatory diagram of a convex portion shown in FIG.

[Explanation of symbols]

9 subject 10,40 Radiation image recording medium 11,41 First electrode layer 12,42 Photoconductive layer for recording 13,43 Charge transport layer 14,44 Photoconductive layer for reading 15,45 Second electrode layer 16,46 stripe electrodes 19,49 Storage unit 20,47 support 30 insulating film 70 Current detection circuit 71 Current detection amplifier 71a operational amplifier 71b integrating capacitor 71c switch 72,48 power supply 73 switch 80 Radiation image 80a, 80b False image 90 Recording light irradiation means 93 Reading light irradiation means Electromagnetic wave for L1 recording (recording light) Electromagnetic wave for reading L2 (reading light)

Continued front page    F term (reference) 2G083 AA03 BB01 CC10 DD20 EE02                 2G088 EE01 FF02 GG21 JJ05 JJ09                       JJ37                 4M118 AA05 AB01 CA15 CB05 FB03                       FB09 FB23 FB25 FB30 GA10                 5C024 AX11 AX17 CY47 GZ36 HX17                       HX35

Claims (4)

[Claims] 1. A first electrode layer that transmits a recording electromagnetic wave, a recording photoconductive layer that exhibits conductivity by receiving the recording electromagnetic wave, and a latent image charge generated in the recording photoconductive layer. An image recording medium having an accumulating power storage unit, a reading photoconductive layer which exhibits conductivity by being irradiated with an electromagnetic wave for reading, and a second electrode layer which transmits the electromagnetic wave for reading in this order, At least one of the first electrode layer and the second electrode layer has a convex portion in a predetermined range, and in the electrode layer having the convex portion, an electrode layer portion including the convex portion is another electrode layer. An image recording medium characterized by being electrically separated from a portion. 2. The image recording medium according to claim 1, further comprising an insulating film for electrically separating the electrode layer portion including the convex portion and the other electrode layer portion. 3. The image recording according to claim 1, wherein the convex portion is caused by bumping generated in at least one of the recording photoconductive layer and the reading photoconductive layer. Medium. 4. A first electrode layer which transmits a recording electromagnetic wave, a recording photoconductive layer which exhibits conductivity by receiving the recording electromagnetic wave, and a latent image charge generated in the recording photoconductive layer. The recording light has a storage unit for accumulating, a reading photoconductive layer that exhibits conductivity by being irradiated with an electromagnetic wave for reading, and a second electrode layer that transmits the electromagnetic wave for reading in this order. In a method of manufacturing an image recording medium, wherein a projection in a predetermined range is present on at least one of a surface of the conductive layer in contact with the first electrode layer and a surface of the reading photoconductive layer in contact with the second electrode layer, An insulating film is formed on a part of the surface of the photoconductive layer on which the convex portion exists, including the convex portion, and the electrode layer is vacuum-deposited on the surface of the photoconductive layer on which the insulating film is formed. By forming a part of the Image recording medium manufacturing method characterized by separating the electrode layer portion formed on the surface and electrically the other electrode layer portion.